i got 37.4 going up to my cabin,there was a bit of traffic so i couldnt do much passing,55-60mph the whole way pretty much,i think i was able to pass cars 2 times,a/c was on too. going home it dropped down to 34.6,going up to my cabin it was 85degrees but on the ride home it was 50-55 degrees but i was passing people left and right tho. but anything better than 30mpg is is fine with me!

 

I have a mostly stock 2010 cobalt LT. just gmpp exhaust. I just came from Nebraska to Pensacola Florida. and when I pulled in my driveway the dash said average mpg was 47 with cruise set at 65 the whole way. have gmpp exhaust



Posted from Cobaltss.net App for Android

 

I just picked up a 07 ss\sc balt today. And averaged 38.5mpg on the way home (2.5hr drive) cruise set all the way and kept it out of boost.

 

I get like 27 doing 73mph, if I'm lucky...